batgrbproduct analysis for trigger=922808

batgrbproduct Analysis for Trigger=922808

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Oct  8 22:21:28 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger922808
======================================================================

  Trigger: 00922808      Segment: 000

  BAT Trigger Time: 588690022.912   [s; MET]
      Trigger Stop: 588690023.936   [s; MET]
               UTC: 2019-08-28T12:59:59.424820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.818484637617   Dec: 27.2367605883349  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.03
     Image Trigger?:     NO
     Rate S/N Ratio:     23.8537208837531  [ if not an image trigger ]
     Image S/N Ratio:    10.03

  Flight Position:   [ source = BAT ]
    RA: 251.818484637617   Dec: 27.2367605883349  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.83879365898   Dec: 27.2873737686881  [deg; J2000]  
        { 16h 47m 21.3s , +27d 17' 14.5" }
         +/- 0.976653754306827 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.282679763818496 [arcmin] (formal 1-sigma fit error)
    SNR: 31.4611527723104
 
  Angular difference between Flight and Ground position is 3.224188 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 715.856000065804 +/- 451.971925576952
        Measured from: -28.0239999294281
                   to: 687.832000136375     [s; relative to TRIGTIME]
     T50: 29.7120000123978 +/- 4.12042716372911
        Measured from: 1.92800009250641
                   to: 31.6400001049042     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 10.7960000038147     
                   to: 11.7960000038147     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -42.3599998950958     
                   to: 898.360000014305     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.766398   2.671623   2.089097   0.594960
           0.216751   0.216868   0.188473   0.163426 [error]
 Peak      0.069659   0.108446   0.108280   0.032659
           0.008510   0.009509   0.009424   0.007219 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 5.04e-07 1.02e-06 1.61e-06 5.62e-06 4.48e-06 8.75e-06   erg/cm2
              Error 8.26e-08 9.86e-08 1.81e-07 1.42e-06 4.45e-07 1.54e-06   erg/cm2
Peak flux Power-law 5.95e-01 7.38e-01 6.66e-01 1.04e+00 2.36e+00 3.04e+00   ph/cm2/s
              Error 1.01e-01 7.61e-02 7.21e-02 2.39e-01 2.15e-01 3.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.08e-07 1.02e-06 1.60e-06 5.92e-06 4.49e-06 9.11e-06   erg/cm2
              Error 8.96e-08 1.04e-07 2.01e-07 1.99e-06 4.47e-07 1.79e-06   erg/cm2
Peak flux Cutoff-PL 5.72e-01 7.52e-01 6.80e-01 8.19e-01 2.34e+00 2.82e+00   ph/cm2/s
              Error 8.97e-02 8.60e-02 8.25e-02 3.38e-01 2.21e-01 4.23e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.343    0.161    -      -           4.86e-04 4.30e-05   50.470 57
CPL   1.337    0.361    9991.6    0.0      4.88e-04 4.52e-04   50.470 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.150    0.158    -      -           2.02e-02 1.83e-03   50.530 57
CPL   0.949    0.491     276.2    0.0      2.53e-02 1.61e-02   50.170 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 67.904000 sec.
T50 in the 50-300 keV band: 19.712000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  940.720  -42.360  898.360
T90   715.856  -28.024  687.832
T50    29.712    1.928   31.640
Peak    1.000   10.796   11.796

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  251.8388    27.2874   0.0061     2.9674   -20.3943         4.3387417     31.461 TRIG_00922808                 
 
Foreground time interval of the image:
-42.360  17.789 (delta_t =  60.149 [sec])
Background time interval of the image:
-447.611 -433.221 (delta_t =  14.390 [sec])
-239.912 -42.360 (delta_t = 197.552 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from  -42.360 sec. to  898.360 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34321     ( -0.160937   0.160123 )
Norm@50keV  : 4.86136E-04    ( -4.30633e-05   4.2942e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.47 using 59 PHA bins.
# Reduced chi-squared =         0.8854 for     57 degrees of freedom 
# Null hypothesis probability =   7.169395e-01
 
Photon flux (15-150 keV)    in 940.7 sec: 5.84850E-02 ( -0.0052806  0.0052928 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.47385e-06 ( -4.42583e-07  4.47128e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -42.360 sec. to  898.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33706     ( -0.559668   0.162387 )
Epeak [keV] : 9991.63      ( -9999.08 -9999.08 )
Norm@50keV  : 4.88188E-04    ( -0.000488054   0.000415078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.47 using 59 PHA bins.
# Reduced chi-squared =         0.9013 for     56 degrees of freedom 
# Null hypothesis probability =   6.833295e-01
 
Photon flux (15-150 keV)    in 940.7 sec: 5.86258E-02 ( -0.005853  0.0054238 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.49098e-06 ( -5.31379e-07  3.6248e-07 ) ergs/cm2

Band function

Time interval is from  -42.360 sec. to  898.360 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 16.6401  (-2.02202  2.39661)
R^2/D10^2   : 4.65924E-03  (-0.00170501   0.00260507)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          84.55 using 59 PHA bins.
# Reduced chi-squared =          1.483 for     57 degrees of freedom 
# Null hypothesis probability =   1.036134e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.486e-07   4.374e-08
25- 50  1.081e-06   1.330e-07
50-150  2.122e-06   3.673e-07
15-150  3.452e-06   4.243e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-32.8428      -200)
Norm        : 0.241387       (-0.0213476     0.0213476)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.98 using 59 PHA bins.
# Reduced chi-squared =         0.9821 for     57 degrees of freedom 
# Null hypothesis probability =   5.134730e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.654e-07   1.013e-07
25- 50  1.088e-06   2.393e-07
50-150  2.385e-06   1.140e-06
15-150  4.038e-06   1.644e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.23086        (-2.25929      2.51716)
R1^2/D10^2  : 3.49843E-02        (-0.0194586      0.0742802)
kT2 [keV]   : 36.6153        (-11.6618      46.059)
R2^2/D10^2  : 2.83407E-04    (-0.000245475   0.000717026)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.45 using 59 PHA bins.
# Reduced chi-squared =         0.9354 for     55 degrees of freedom 
# Null hypothesis probability =   6.111438e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.605e-07   1.561e-07
25- 50  1.082e-06   3.773e-07
50-150  2.997e-06   1.424e-06
15-150  4.539e-06   1.899e-06

Peak spectrum fit

Power-law model

Time interval is from   10.796 sec. to   11.796 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14991     ( -0.158197   0.157076 )
Norm@50keV  : 2.02176E-02    ( -0.00183406   0.00183247 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.53 using 59 PHA bins.
# Reduced chi-squared =         0.8864 for     57 degrees of freedom 
# Null hypothesis probability =   7.149204e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.35776 ( -0.21521  0.21532 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08157e-07 ( -2.17595e-08  2.19501e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   10.796 sec. to   11.796 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.948592     ( -0.644996   0.337955 )
Epeak [keV] : 276.246      ( -276.247 -276.247 )
Norm@50keV  : 2.53275E-02    ( -0.00670485   0.0255659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.17 using 59 PHA bins.
# Reduced chi-squared =         0.8960 for     56 degrees of freedom 
# Null hypothesis probability =   6.939793e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.33994 ( -0.22187  0.22106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.05215e-07 ( -2.37052e-08  2.33607e-08 ) ergs/cm2

Band function

Time interval is from   10.796 sec. to   11.796 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 18.5749  (-2.24518  2.65915)
R^2/D10^2   : 0.139360  (-0.0488085   0.0724651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.29 using 59 PHA bins.
# Reduced chi-squared =          1.303 for     57 degrees of freedom 
# Null hypothesis probability =   6.166828e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.527e-09   1.720e-09
25- 50  4.509e-08   6.010e-09
50-150  1.138e-07   1.898e-08
15-150  1.684e-07   2.125e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-22.5611      -200)
Norm        : 9.49286       (-0.880355     0.880355)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.69 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     57 degrees of freedom 
# Null hypothesis probability =   1.780695e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.363e-08   9.384e-09
25- 50  4.546e-08   1.243e-08
50-150  9.969e-08   5.470e-08
15-150  1.688e-07   7.961e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.01966        (-2.64332      3.36762)
R1^2/D10^2  : 1.21804        (-0.722391      1.55315)
kT2 [keV]   : 32.4719        (-9.08336      29.9522)
R2^2/D10^2  : 1.87318E-02    (-0.0147881   0.0336894)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.30 using 59 PHA bins.
# Reduced chi-squared =         0.9145 for     55 degrees of freedom 
# Null hypothesis probability =   6.546649e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.713e-08   9.120e-09
25- 50  4.365e-08   1.895e-08
50-150  1.411e-07   7.770e-08
15-150  2.019e-07   9.483e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27495     ( -0.0784149   0.0780292 )
Norm@50keV  : 4.67189E-03    ( -0.000194833   0.000194831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.16 using 59 PHA bins.
# Reduced chi-squared =         0.9501 for     57 degrees of freedom 
# Null hypothesis probability =   5.824560e-01
 
Photon flux (15-150 keV)    in 60.15 sec: 0.554878 ( -0.0242192  0.0242748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.79429e-06 ( -1.29422e-07  1.30126e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27033     ( -0.226629   0.0785765 )
Epeak [keV] : 9996.18      ( -9998.97 -9998.97 )
Norm@50keV  : 4.69232E-03    ( -0.000195748   0.00125326 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9674 for     56 degrees of freedom 
# Null hypothesis probability =   5.441736e-01
 
Photon flux (15-150 keV)    in 60.15 sec: 0.554996 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.79264e-06 ( -1.24565e-07  1.30369e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.02e-06
S(50-100 keV) = 1.61e-06

T90 vs. Hardness ratio plot

T90                                   = 715.856000065804 sec.
Hardness ratio (energy fluence ratio) = 1.57843

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.51247
Count Ratio (50-100 keV) / (15-25 keV) = 1.18269

Mask shadow pattern

IMX = 4.858860036242880E-02, IMY = 1.806440290452787E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-447.611410 -433.221300
-239.912000 -42.360000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9990 -15.6352    1.9  40.5  172.5   5.0825   6.1    1.2	Sco X-1                       
254.2698  35.3502    6.2  11.2   -8.2   0.8183   1.9    9.2	Her X-1                       
268.3700  -1.3167    4.0  30.2  128.0  -2.4041  -2.9    8.2	SW J1753.5-0127               
288.8216  10.9213   59.8  37.4   86.5   0.2732   0.2    2.0	GRS 1915+105                  
299.6793  35.2066    2.1  42.4   45.8   5.9845   5.4    4.4	Cyg X-1                       
307.9849  41.0272   10.6  49.1   38.0  -1.6589  -1.1    7.2	Cyg X-3                       
244.6953 -21.6761    2.9  46.5  171.5   4.6869   4.0 ------	UNKNOWN                       
230.6772  35.5008    2.5  21.5  -71.6   2.4118   4.6 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-42.360000 17.788590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9703 -15.7249    5.3  40.6  172.5   0.5263   2.2    5.1	Sco X-1                       
254.6315  35.3023    5.1  11.2   -6.7  -0.3177  -2.3    8.8	Her X-1                       
268.4232  -1.3255   12.5  30.2  127.9  -0.2447  -0.9    8.3	SW J1753.5-0127               
288.9876  10.9727    7.1  37.6   86.3  -0.8832  -1.6   11.3	GRS 1915+105                  
299.5972  35.3340    6.7  42.3   45.6  -0.7072  -1.7    8.0	Cyg X-1                       
308.0832  41.0931    5.6  49.2   37.9  -1.2819  -2.0    8.5	Cyg X-3                       
251.8388  27.2874    0.4   3.0  -20.4   4.3386  31.5 ------	UNKNOWN                       
226.9891  43.0471    2.4  27.8  -59.4   0.7439   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
41.988600 962.219300
1771.088000 1918.863800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9881 -15.6424    1.7  43.4  178.8  28.2691   6.9    0.5	Sco X-1                       
254.2828  35.3855    6.5   8.4    3.1  -3.3202  -1.8    8.9	Her X-1                       
268.2276  -1.4371    7.0  32.7  137.8  -6.1198  -1.6    8.5	SW J1753.5-0127               
288.7897  10.9463   66.2  38.3   97.1   1.1109   0.2    0.5	GRS 1915+105                  
299.6331  35.1123    3.9  41.3   56.0  16.9162   2.9    5.8	Cyg X-1                       
250.0808 -19.2709    3.0  46.5  171.5  19.8038   3.9 ------	UNKNOWN                       
261.7136  64.1732    2.4  37.5   -3.7  11.5139   4.8 ------	UNKNOWN                       
253.5336  77.2370    2.5  50.0  -10.2  15.6220   4.5 ------	UNKNOWN

Plot creation:
Wed Oct  9 18:05:41 EDT 2019